added yazi as filechooser for xdg, and added override for some

conflicted package

home/config/niri/env.kdl

@@ -47,6 +47,9 @@ environment {
     // Electron/Chromium: Automatically flags apps (VS Code, Discord, Obsidian) to use Wayland.
     ELECTRON_OZONE_PLATFORM_HINT "auto"
 
+    // GTK: Route file dialogs through the XDG portal (yazi file picker).
+    GDK_DEBUG "portals"
+
     // =========================================================================
     // 5. DESKTOP SESSION IDENTIFICATION
     // =========================================================================

home/config/niri/keybinds.kdl

@@ -16,6 +16,7 @@ binds {
     Mod+Down { focus-workspace-down; }
 
     Mod+R { switch-preset-column-width; }
+    Mod+Shift+R { switch-preset-column-width-back; }
 
     Mod+Ctrl+R { reset-window-height; }
 

home/config/niri/layout.kdl

@@ -7,7 +7,7 @@ layout {
     preset-column-widths {
         proportion 0.33333
         proportion 0.5
-        proportion 0.66667
+        proportion 1.0
     }
 
     default-column-width { proportion 0.5; }

home/config/niri/wrules.kdl

@@ -3,6 +3,13 @@ window-rule {
     open-floating true
 }
 
+window-rule {
+    match title="^termfilechooser$"
+    open-floating true
+    default-column-width { proportion 0.6; }
+    default-window-height { proportion 0.6; }
+}
+
 window-rule {
     geometry-corner-radius 12
     clip-to-geometry true

home/default.nix

@@ -4,6 +4,7 @@
   imports = [
     ./shell.nix
     ./dotfiles.nix
+    ./portal.nix
     ./packages
   ];
 

home/packages/web.nix

@@ -34,6 +34,10 @@ in
   programs.zen-browser = {
     enable = true;
     setAsDefaultBrowser = true;
-    profiles.default.sine.enable = true;
+    profiles.default = {
+      sine.enable = true;
+      # Use the XDG portal (yazi, see home/portal.nix) for file dialogs.
+      settings."widget.use-xdg-desktop-portal.file-picker" = 1;
+    };
   };
 }

home/portal.nix

@@ -0,0 +1,53 @@
+{ pkgs, config, ... }:
+let
+  termfilechooser = pkgs.xdg-desktop-portal-termfilechooser;
+in
+{
+  # Use yazi (in alacritty) as the file picker for every app that goes through
+  # the XDG FileChooser portal.
+  #
+  # Portal/D-Bus files are found through XDG_DATA_DIRS (user profile), so we
+  # deliberately don't enable HM's `xdg.portal`: it would point
+  # NIX_XDG_DESKTOP_PORTAL_DIR at the user profile only and hide the
+  # system-wide gnome/gtk portals that niri relies on.
+  home.packages = [ termfilechooser ];
+
+  # The D-Bus activation file references this unit by name, and HM doesn't
+  # link `share/systemd/user` from packages.
+  systemd.user.services.xdg-desktop-portal-termfilechooser = {
+    Unit = {
+      Description = "Portal service (terminal file chooser implementation)";
+      PartOf = [ "graphical-session.target" ];
+      After = [ "graphical-session.target" ];
+    };
+    Service = {
+      Type = "dbus";
+      BusName = "org.freedesktop.impl.portal.desktop.termfilechooser";
+      ExecStart = "${termfilechooser}/libexec/xdg-desktop-portal-termfilechooser";
+      Environment = [ "PATH=${config.home.profileDirectory}/bin:/run/current-system/sw/bin" ];
+      Restart = "on-failure";
+      Slice = "session.slice";
+    };
+  };
+
+  xdg.configFile = {
+    # Overrides niri's shipped niri-portals.conf, so its entries are repeated here.
+    "xdg-desktop-portal/niri-portals.conf".text = ''
+      [preferred]
+      default=gnome;gtk;
+      org.freedesktop.impl.portal.Access=gtk;
+      org.freedesktop.impl.portal.Notification=gtk;
+      org.freedesktop.impl.portal.Secret=gnome-keyring;
+      org.freedesktop.impl.portal.FileChooser=termfilechooser;
+    '';
+
+    "xdg-desktop-portal-termfilechooser/config".text = ''
+      [filechooser]
+      cmd=${termfilechooser}/share/xdg-desktop-portal-termfilechooser/yazi-wrapper.sh
+      default_dir=$HOME
+      env=TERMCMD=alacritty --title termfilechooser -e
+      open_mode=suggested
+      save_mode=suggested
+    '';
+  };
+}